Update 'Regular Expression' section in ref guide
Update 'Regular Expression' section in ref guide

Wingless-Archangel/haka,lcheylus/haka,haka-security/haka,nabilbendafi/haka,lcheylus/haka,nabilbendafi/haka,haka-security/haka,nabilbendafi/haka,LubyRuffy/haka,lcheylus/haka,LubyRuffy/haka,haka-security/haka,Wingless-Archangel/haka